Valve-seat reamer



Patented dan.. Z3, i923. i i A HARRYAH. HICKS, OF HELIX, OREGON.

VALVE-SEAT BEAMER.

Application filed February 11, 1919. Serial No. 276,249.

To @ZZ fio/mm t may conce/Mi.

Be it known that i, HARRY clninnnrr HICKS, a citizen ot the UnitedStates, residing' at Helix, in the county of Umatilla, State oft Oregon,have inventeduew and useful Valve-Seat `Fleamers; and. i do Aherebydeclare the 'following' to be a full, clear, and enact description ofthe invention, such as will enable others skilled in the art to which itappertains to malte and use the same,

The invention relates to adjustable reamers and has for its object toprovide a reamer of this character, wherein it will be possible toadjust the cutters thereof so that they will reain or out at variousangles. This reaming` at variousv angles is necessary particularly invalve seats ot different types or' internal combustion engines, when itbecomes necessaryto regrind and reseat the valves of the engine.

A 'further object is to provide an adjustable valve seattreamer having abody inem` ber adapted to be rotated, and to provide said body memberwith a series ot radially arranged cutter blades slidably mounted inarcuate slots,'the upper ends ot the cutters being resiliently held by aspring and adjustable means contacting with the lower ends of the cutterblades so that the cutters may be forced upwardly, in the arcuate slotsso as to change the angle oi their out ting edges, also to provide thebody member with a depending' portion so that said portion when passedthrough the guide oi the Valve stem will guide the reamer at its proper'angle during' the roaming operation. The angle of adjustment of' thecutters is generally trom 25 to `65 degrees, therefore the cutters ontheir curved edges may be provided with graduations, whereby the angleof the cutting edges of the cutters may be easily and quickly adjusted.

ith the above and other objects in riew, the invention resides in thecombination and arrangement of parts hereinafter described, shown in thedrawings andL claimed, it being understood that changes in the preciseembodiment of t-he invention may be made within the scope oi' what isclaimed without depa-rtii'ig from the spirit oic the invention.

In the drawings Figure l is a side elevation of the reamer, showing thesame partly in section and in position tor reaming a valve seat and itsguide member in the valve stem guide.

Figure 2 is a sectional View tl'irough the reamer taken on line 2-2 ot'Figure l.

Figure is a horizontal sectional View taken on line BH3 oi2 Figure l.

Figure L is a perspective view ot one of the cutters, showing' thegraduations on the edge thereof.

Referring to the drawings the numeral, i designates the body oi thereamer., which comprises the head 2 and the shank 3. A pin 4 passesthrough an aperture at the upper end of the shank, said pin formingmeans to be grasped by the hands so that t-he reamer may be rotatedduring a reaming operation. The head 2 is preferably conical in shape sothat its surface 6 willV taper downwardly and inwardly. Arouate slots 7are provided in the head 2 and are radially disposed, there being;preiierably eight slots, however it is to be understood that thenumberof said slots may be increased or diminished as desired. Cutters 8having` curved edges 9 ot the same curvature as the wall l() oi thearcuate slots are dis posed in the slots 7. cutting' edge llwhich isstraight and adapted to be arranged at dierent angles so as to conformto the angle that it is desired to ream the valve seat l2 ot the engine.

The cutters 8, near their upper ends are provided with apertures l) andextending; through said apertures is an endless coiled spring' 14.However it is to be understood that instead oi the coiled spring, asplit spring wire spring` may be used theretor.

r'he head 2 is provided with a threaded aperture 26 for the reception ofa threaded extension 27 which is threaded therein and is providedavithan adjusting' meinher 27, `Eidension 27 of the adjusting n'ieinliier isprovided with partially threaded aperture 28.. the threaded partoi whichreceives the threaded portion Q9 oi the reamer gold-- 23: rhe upper endoi the aperture 2S not threaded and as shown at 30 and adapted toreceive the portion. et ti guide 25a. This portion 31 et' the gruieterminates in a point 32, which engages th walls 33 oi the upper end otthe portion or the aperture QS. The upper end ot th extension 27 isprovided with siots Bt so that when the tapered end of the portion 3l isforced into engagement with the walls ot the split end ot portion 27said portion will be locked. against rotation in the Each cutter' 8 hasthreaded aperture 26. The adjusting nut E27 is provided with a liang'e27h which engages the bevelled surfaces Sl at the lower ends of thecutters 8, thereby forcing the cutters to slidably move in 'the arcuateslots 7 of the reamer head 2 against the action of the coiled spring laas the adjusting nut 272L is screwed upwardly in the threaded apertureQG. Vhen the adjusting nut 27 is screwed downwardly the coiled springl-l- 'will cause theK cutters to keep in contact with the iange QT" ofthe adjusting nut 27,

I'Vhen it is desired to ream a valve seat, the necessary angle ot' whichis known, the adjusting member 27 is adjusted upwardly or downwardlyagainst or with the tension of the spring llt which passes through theapertures in the upper ends ot the cutters, the operator vwatching thegraduation on the curved edge of the cutters, and when the desiredgraduation is in registration. with the edge 35 ot the reainer head Qthe adjusting of the adjusting member 27 is stopped. .It will be seenthat by moving the, adjusting member upwardly, said adjusting member Q7will force the cutters to slide in the arcuate slots 10, against theaction of the spring 14, this Sliding changing the angle or' the cuttingedge of the cutters. Also that any downward ymovement of the adjusting`member 27 will allow the spring la to cause the cutters to move inwardlyat their upper ends, thereby changing the angle of the cutting edge ofthe cutters 'in the other direction from that causedby an upwardmovement of the adj Listing member 27'.

The invention having been set Jr'ortli,\vl1at is claimed as new anduseful is A reainer comprising a conically shaped head, segmentallyshaped cutters radially disposed in segmentally shaped grooves in theconically shaped head, the upper ends or said cutters being` spaced fromthe conically shaped head and provided with apertures, a coiled springextending through said apertures and around the conically shaped head inregistration with an annular groove in the head and adapted to bereceived therein, the lower ends of the segiuentally shaped blades beingprovided with inwardly and downwardly extending surfaces, an adjustingscrew threaded axially into the head, said adjusting screw beingprovided with an outwardly and upwardly extending flange, said outwardlyand upwardly extending flange co-operating with downwardly and inwardlyextending sur- `taces of the blades Vtor adjusting said blades angularlyin the arcuate slots against the action of the spring.

In testimony whereot- I have signed my name to this specilication in thepresence of two subscribing witnesses.

HARRY H. HICKS.

k'Vitnesses i L. D. SMITH, GEO. W. PIPER.

